Too high IQ sometimes makes a person get too proud/deluded and make them believe in lies, more so than even people of normal intelligence do. They create crazy untrue theories and get ingrained in them.
1st Cor 1 27-29 KJV:
27 But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty;
28 And base things of the world, and things which are despised, hath God chosen, yea, and things which are not, to bring to nought things that are:
29 That no flesh should glory in his presence.